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In a survey of 100 people, 60 like tea, 50 like coffee, and 30 like both. How many like neither?
A$10$
B$30$
C$20$
D$40$
Answer & Solution
Correct answer: C. $20$
|tea ∪ coffee| = 60 + 50 − 30 = 80. Neither = 100 − 80 = 20.
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